Commit graph

3074 commits

Author SHA1 Message Date
Arnd Bergmann
3723c63247 treewide: convert ISO_8859-1 text comments to utf-8
Almost all files in the kernel are either plain text or UTF-8 encoded.  A
couple however are ISO_8859-1, usually just a few characters in a C
comments, for historic reasons.

This converts them all to UTF-8 for consistency.

Link: http://lkml.kernel.org/r/20180724111600.4158975-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Simon Horman <horms@verge.net.au>			[IPVS portion]
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>	[IIO]
Acked-by: Michael Ellerman <mpe@ellerman.id.au>			[powerpc]
Acked-by: Rob Herring <robh@kernel.org>
Cc: Joe Perches <joe@perches.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-23 18:48:43 -07:00
Linus Torvalds
99cc7ad46b Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:

 - the core has now a lockless variant of i2c_smbus_xfer. Some open
   coded versions of this got removed in drivers. This also enables
   proper SCCB support in regmap.

 - locking got a more precise naming. i2c_{un}lock_adapter() had to go,
   and we know use i2c_lock_bus() consistently with flags like
   I2C_LOCK_ROOT_ADAPTER and I2C_LOCK_SEGMENT to avoid ambiguity.

 - the gpio fault injector got a new delicate testcase

 - the bus recovery procedure got fixed to handle the new testcase
   correctly

 - a new quirk flag for controllers not able to handle zero length
   messages together with driver updates to use it

 - new drivers: FSI bus attached I2C masters, GENI I2C controller, Owl
   family S900

 - and a good set of driver improvements and bugfixes

* 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (77 commits)
  i2c: rcar: implement STOP and REP_START according to docs
  i2c: rcar: refactor private flags
  i2c: core: ACPI: Make acpi_gsb_i2c_read_bytes() check i2c_transfer return value
  i2c: core: ACPI: Properly set status byte to 0 for multi-byte writes
  dt-bindings: i2c: rcar: Add r8a774a1 support
  dt-bindings: i2c: sh_mobile: Add r8a774a1 support
  i2c: imx: Simplify stopped state tracking
  i2c: imx: Fix race condition in dma read
  i2c: pasemi: remove hardcoded bus numbers on smbus
  i2c: designware: Add SPDX license tag
  i2c: designware: Convert to use struct i2c_timings
  i2c: core: Parse SDA hold time from firmware
  i2c: designware-pcidrv: Mark expected switch fall-through
  i2c: amd8111: Mark expected switch fall-through
  i2c: sh_mobile: use core to detect 'no zero length read' quirk
  i2c: xlr: use core to detect 'no zero length' quirk
  i2c: rcar: use core to detect 'no zero length' quirk
  i2c: stu300: use core to detect 'no zero length' quirk
  i2c: pmcmsp: use core to detect 'no zero length' quirk
  i2c: mxs: use core to detect 'no zero length' quirk
  ...
2018-08-21 17:40:46 -07:00
Maxime Roussin-Bélanger
496fb59e12 iio: light: si1133: fix uninitialized resp variable
Read response register to detect any error.

Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-01 19:01:35 +01:00
Jonathan Cameron
2b4ec22d36 Merge branch 'fixes-togreg' into togreg 2018-08-01 18:56:17 +01:00
Colin Ian King
1e96e93a35 iio: light: si1133 fix test for val being not zero or not one.
The current check on val always results in true and so the
call to sii1133_update_adcsens never gets called. Fix this check
so it returns with -EINVAL only when val is not zero and not one.

Detected by CoverityScan, CID#1472099 ("Logically dead code")

Fixes: e01e7eaf37 ("iio: light: introduce si1133")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-30 19:28:47 +01:00
Manish Narani
2fa03b92b6 iio: adc: xilinx: Move request_irq before enabling interrupts
Enabling the Interrupts before registering the irq handler is a bad
idea. This patch corrects the same for XADC driver.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 13:30:35 +01:00
Manish Narani
50e8e9f309 iio: adc: xilinx: Remove platform_get_irq from xadc_remove function
This patch avoids getting irq number in xadc_remove function. Instead
store 'irq' in xadc struct and use xadc->irq wherever needed.
This patch also resolves a warning reported by coverity where it asks to
check return value of platform_get_irq() for any errors in xadc_remove.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 12:52:21 +01:00
Manish Narani
81f5471838 iio: adc: xilinx: limit pcap clock frequency value
This patch limits the xadc pcap clock frequency value to be less than
200MHz. This fixes the issue when zynq is booted at higher frequency
values, pcap crosses the maximum limit of 200MHz(Fmax) as it is derived
from IOPLL.
If this limit is crossed it is required to alter the WEDGE and REDGE
bits of XADC_CFG register to make timings better in the interface. So to
avoid alteration of these bits every time, the pcap value should not
cross the Fmax limit.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 12:49:48 +01:00
Manish Narani
0a8460966f iio: adc: xilinx: Check for return values in clk related functions
This patch adds check for return values from clock related functions.
This was reported by static code analysis tool.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 12:46:38 +01:00
Tomas Novotny
be38866fbb iio: vcnl4000: add support for VCNL4200
VCNL4200 is an integrated long distance (up to 1500mm) proximity and
ambient light sensor.

The support is very basic. There is no configuration of proximity and
ambient light sensing yet. Only the reading of both measured values is
done.

The reading of ambient light and proximity values is blocking. If you
request a new value too early, the driver waits for new value to be
ready.

Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 12:19:28 +01:00
Tomas Novotny
58bf9ace8c iio: vcnl4000: warn on incorrectly specified device id
We can detect incorrectly specified device id for some chips, so warn
user in that case.

Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 11:03:55 +01:00
Tomas Novotny
50c50b975d iio: vcnl4000: add VCNL4010 and VCNL4020 device id
The driver already supports VCNL4010/20 devices. The currently supported
features and detectable product id are the same, so add shared id for
them.

This is a groundwork to extend the driver by detecting incorrectly
specified device id.

Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 09:41:53 +01:00
Tomas Novotny
1ebc787ae5 iio: vcnl4000: make the driver extendable
There are similar chips in the vcnl4xxx family. The initialization and
communication is a bit different for members of the family, so this
patch makes the driver extendable for different chips.

There is no functional change.

Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-29 08:58:33 +01:00
Nicholas Mc Guire
cebc4585f6 iio: ad_sigma_delta: use unsigned long for timeout
wait_for_completion_timeout returns unsigned long not int so an appropriate
variable is declared and the assignment and check fixed up.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-28 12:15:03 +01:00
Himanshu Jha
1b3bd85927 iio: chemical: Add support for Bosch BME680 sensor
Bosch BME680 is a 4-in-1 sensor with temperature, pressure, humidity
and gas sensing capability. It supports both I2C and SPI communication
protocol for effective data communication.

The device supports two modes:

1. Sleep mode
2. Forced mode

The measurements only takes place when forced mode is triggered and a
single TPHG cycle is performed by the sensor. The sensor automatically
goes to sleep after afterwards.

The device has various calibration constants/parameters programmed into
devices' non-volatile memory(NVM) during production and can't be altered
by the user. These constants are used in the compensation functions to
get the required compensated readings along with the raw data. The
compensation functions/algorithms are provided by Bosch Sensortec GmbH
via their API[1]. As these don't change during the measurement cycle,
therefore we read and store them at the probe. The default configs
supplied by Bosch are also set at probe.

0-day tested with build success.

GSoC-2018: https://summerofcode.withgoogle.com/projects/#6691473790074880
Mentor: Daniel Baluta
[1] https://github.com/BoschSensortec/BME680_driver
Datasheet:
https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME680-DS001-00.pdf

Note from Jonathan: The compensation functions are 'interesting' and
could do with a tidy up in future.  However, they work so we can leave that
for another day.

Cc: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-28 11:38:46 +01:00
Michael Hennerich
6431975789 iio: ad9523: support for external signals via gpios
The AD9523 supports external signals for power-down mode, resetting the
device and sync timing.
This change add support for specifying values for these signals via the
gpios and initializing them default values.

For the reset signal, the GPIO is toggled during probing to re-initialize
the device to a known state.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-28 10:41:14 +01:00
Lars-Peter Clausen
9a5094ca29 iio: ad9523: Fix return value for ad952x_store()
A sysfs write callback function needs to either return the number of
consumed characters or an error.

The ad952x_store() function currently returns 0 if the input value was "0",
this will signal that no characters have been consumed and the function
will be called repeatedly in a loop indefinitely. Fix this by returning
number of supplied characters to indicate that the whole input string has
been consumed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Fixes: cd1678f963 ("iio: frequency: New driver for AD9523 SPI Low Jitter Clock Generator")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-28 10:35:34 +01:00
Greg Kroah-Hartman
3ceefa3ffd Second set of IIO new device support, features and cleanups.
There are also a couple of fixes that can wait for the coming merge
 window.
 
 Core new features
 
 * Support for phase channels (used in time of flight sensors amongst
   other things)
 * Support for deep UV light channel modifier.
 
 New Device Support
 
 * AD4758 DAC
   - New driver and dt bindings.
 * adxl345
   - Support the adxl375 +-200g part which is register compatible.
 * isl29501 Time of flight sensor.
   - New driver
 * meson-saradc
   - Support the Meson8m2 Socs - right now this is just an ID, but there will
     be additional difference in future.
 * mpu6050
   - New ID for 6515 variant.
 * si1133 UV sensor.
   - New driver
 * Spreadtrum SC27xx PMIC ADC
   - New driver and dt bindings.
 
 Features
 
 * adxl345
   - Add calibration offset readback and writing.
   - Add sampling frequency control.
 
 Fixes and Cleanups
 
 * ad5933
   - Use a macro for the channel definition to reduce duplication.
 * ad9523
   - Replace use of core mlock with a local lock. Part of ongoing efforts
     to avoid confusing the purpose of mlock which is only about iio core
     state changes.
   - Fix displayed phase which was out by a factor of 10.
 * adxl345
   - Add a link to the datasheet.
   - Rework the use of the address field in the chan_spec structures to
     allow addition of more per channel information.
 * adis imu
   - Mark switch fall throughs.
 * at91-sama5d2
   - Fix some casting on big endian systems.
 * bmp280
   - Drop some DT elements that aren't used and should mostly be done from
     userspace rather than in DT.
 * hx711
   - add clock-frequency dt binding and resulting delay to deal with capacitance
     issue on some boards.
   - fix a spurious unit-address in the example.
 * ina2xx
   - Avoid a possible kthread_stop with a stale task_struct.
 * ltc2632
   - Remove some unused local variables (assigned but value never used).
 * max1363
   - Use device_get_match_data to remove some boilerplate.
 * mma8452
   - Mark switch fall throughs.
 * sca3000
   - Fix a missing return in a switch statement (a bad fallthrough
     previously!)
 * sigma-delta-modulator
   - Drop incorrect unit address from the DT example.
 * st_accel
   - Use device_get_match_data to drop some boiler plate.
   - Move to probe_new for i2c driver as second parameter not used.
 * st_sensors library
   - Use a strlcpy (safe in this case).
 * st_lsm6dsx
   - Add some error logging.
 * ti-ads7950
   - SPDX
   - Allow simultaneous buffered and polled reads. Needed on a Lego Mindstorms
     EV3 where some channels are used for power supply monitoring at a very low
     rate.
 * ti-dac5571
   - Remove an unused variable.
 * xadc
   - Drop some dead code.
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Merge tag 'iio-for-4.19b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of IIO new device support, features and cleanups.

There are also a couple of fixes that can wait for the coming merge
window.

Core new features

* Support for phase channels (used in time of flight sensors amongst
  other things)
* Support for deep UV light channel modifier.

New Device Support

* AD4758 DAC
  - New driver and dt bindings.
* adxl345
  - Support the adxl375 +-200g part which is register compatible.
* isl29501 Time of flight sensor.
  - New driver
* meson-saradc
  - Support the Meson8m2 Socs - right now this is just an ID, but there will
    be additional difference in future.
* mpu6050
  - New ID for 6515 variant.
* si1133 UV sensor.
  - New driver
* Spreadtrum SC27xx PMIC ADC
  - New driver and dt bindings.

Features

* adxl345
  - Add calibration offset readback and writing.
  - Add sampling frequency control.

Fixes and Cleanups

* ad5933
  - Use a macro for the channel definition to reduce duplication.
* ad9523
  - Replace use of core mlock with a local lock. Part of ongoing efforts
    to avoid confusing the purpose of mlock which is only about iio core
    state changes.
  - Fix displayed phase which was out by a factor of 10.
* adxl345
  - Add a link to the datasheet.
  - Rework the use of the address field in the chan_spec structures to
    allow addition of more per channel information.
* adis imu
  - Mark switch fall throughs.
* at91-sama5d2
  - Fix some casting on big endian systems.
* bmp280
  - Drop some DT elements that aren't used and should mostly be done from
    userspace rather than in DT.
* hx711
  - add clock-frequency dt binding and resulting delay to deal with capacitance
    issue on some boards.
  - fix a spurious unit-address in the example.
* ina2xx
  - Avoid a possible kthread_stop with a stale task_struct.
* ltc2632
  - Remove some unused local variables (assigned but value never used).
* max1363
  - Use device_get_match_data to remove some boilerplate.
* mma8452
  - Mark switch fall throughs.
* sca3000
  - Fix a missing return in a switch statement (a bad fallthrough
    previously!)
* sigma-delta-modulator
  - Drop incorrect unit address from the DT example.
* st_accel
  - Use device_get_match_data to drop some boiler plate.
  - Move to probe_new for i2c driver as second parameter not used.
* st_sensors library
  - Use a strlcpy (safe in this case).
* st_lsm6dsx
  - Add some error logging.
* ti-ads7950
  - SPDX
  - Allow simultaneous buffered and polled reads. Needed on a Lego Mindstorms
    EV3 where some channels are used for power supply monitoring at a very low
    rate.
* ti-dac5571
  - Remove an unused variable.
* xadc
  - Drop some dead code.
2018-07-25 10:12:07 +02:00
Gustavo A. R. Silva
c5b974bee9 iio: sca3000: Fix missing return in switch
The IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY case is missing a
return and will fall through to the default case and errorenously
return -EINVAL.

Fix this by adding in missing *return ret*.

Fixes: 626f971b5b ("staging:iio:accel:sca3000 Add write support to the low pass filter control")
Reported-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-24 18:17:18 +01:00
Lars-Peter Clausen
5a4e33c1c5 iio: ad9523: Fix displayed phase
Fix the displayed phase for the ad9523 driver. Currently the most
significant decimal place is dropped and all other digits are shifted one
to the left. This is due to a multiplication by 10, which is not necessary,
so remove it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Fixes: cd1678f963 ("iio: frequency: New driver for AD9523 SPI Low Jitter Clock Generator")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-24 18:17:08 +01:00
Martin Blumenstingl
ffc0d638c8 iio: adc: meson-saradc: add support for the Meson8m2 SoCs
The SAR ADC on Meson8m2 behaves identical to the one found in the
Meson8b SoCs. Add a separate compatible string because the temperature
sensor logic (not supported yet) differs between Meson8 and Meson8m2
(however, it's the same for Meson8b and Meson8m2).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:13 +01:00
David Lechner
8134b613b0 iio: adc: ti-ads7950: allow simultaneous use of buffer and direct mode
This modifies the TI ADS7950 A/DC driver to allow the simultaneous use
of both the triggered buffer and reading channels directly (via in-
kernel API or sysfs).

The use case for this is on LEGO MINDSTORMS EV3. Two of the voltage
channels are used in-kernel by a power supply driver, which reads the
values using iio_read_channel_processed(). These channels are only read
at a slow rate (<= 1Hz).  However, we want to be able to read 12 other
channels at the same time using the triggered buffer at a high rate (>=
100Hz).

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:12 +01:00
David Lechner
7d7209f0c4 iio: adc: ti-ads7950: use SPDX-License-Identifier
This updates the ti-ads7950.c file to use SPDX-License-Identifier
instead of more verbose license text.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:12 +01:00
Dan Carpenter
a176ba37e6 iio: adc: at91-sama5d2_adc: fix up casting in at91_adc_read_info_raw()
This code is problematic because we're supposed to be writing an int but
we instead write to only the high 16 bits.  This doesn't work on big
endian systems, and there is a potential that the bottom 16 bits are
used without being initialized.

Fixes: 23ec2774f1 ("iio: adc: at91-sama5d2_adc: add support for position and pressure channels")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:12 +01:00
Lars-Peter Clausen
69f894c3f3 iio: ad9523: replace core mlock with local lock
This is also part of a long term effort to make the use of mlock opaque and
single purpose.

This lock is required for accessing device registers. The device may be
accessed by multiple processes at the same time, and this can result in
inconsistent data, where one device reads data before the other one has
finished writing.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:11 +01:00
Manish Narani
c344a327ba iio: adc: xilinx: Remove dead code from xadc_zynq_setup
This patch removes dead code from xadc_zynq_setup. The condition
"if (tck_rate > XADC_ZYNQ_TCK_RATE_MAX)" cannot be true at any point of
time. There is also an incompatible parameter used in the code.
This patch fixes the same reported by coverity.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:11 +01:00
Maxime Roussin-Bélanger
e01e7eaf37 iio: light: introduce si1133
e-mail received from Silicon Lab to confirm that the licensing
isn't a problem.

"
Dear Maxime Roussin-Belanger,

The LUX calculation code only works with Si1133.
As long as the software is used with Silicon Lab's sensor product,
I don't see any problem.

Regards,
Tony
"

Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
Reviewed-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:11 +01:00
Maxime Roussin-Bélanger
c0e4e0fd95 iio: Add modifier for DUV light
Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:10 +01:00
Mathieu Othacehe
1c28799257 iio: light: isl29501: Add support for the ISL29501 ToF sensor.
This patch adds support for the ISL29501 Time of Flight sensor.

Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-23 19:18:10 +01:00
Mathieu Othacehe
c73314e6eb iio: Add channel for Phase
Add new channel type support for phase.

This channel may be used by Time-of-flight sensors to express the
phase difference between emitted and received signals. Those sensor
will then use the phase shift of return signals to approximate the
distance to objects.

Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-21 15:28:14 +01:00
Dominique Martinet
cd570e6fa4 iio: change strncpy+truncation to strlcpy
Generated by scripts/coccinelle/misc/strncpy_truncation.cocci

Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-15 11:38:06 +01:00
Lars-Peter Clausen
ef89f4b96a iio: adxl345: Add support for the ADXL375
The ADXL375 is fully register map compatible to the ADXL345 (including the
device ID register returning the same value ...).

The only difference is the resolution of the acceleration sensor. The
ADXL375 can measure up to +-200g of acceleration.

Datasheet:
http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL375.PDF

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-15 10:18:15 +01:00
Lorenzo Bianconi
a42174983c iio: imu: st_lsm6dsx: add error logs to st_lsm6dsx_read_fifo()
Add debug info to error conditions in st_lsm6dsx_read_fifo routine

Suggested-by: Jorge Ramirez-Ortiz <jramirez@baylibre.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-15 10:11:22 +01:00
Brian Masney
de8df0b9c3 iio: imu: mpu6050: add support for 6515 variant
This patch adds support for the MPU 6515 variant. Confirmed that the
driver functions correctly on a LG Nexus 5 (hammerhead) phone.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-15 09:40:54 +01:00
Andreas Klinger
461631face iio: hx711: add delay until DOUT is ready
On a system with parasitic capacitance it turned out that DOUT is not ready
after 100 ns after PD_SCK has raised. A measurement showed almost 1000 ns
until DOUT has reached its correct value.

With this patch its now possible to wait until data is ready.

The wait time should not be higher than the maximum PD_SCK high time which
is corresponding to the datasheet 50000 ns.

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-15 09:36:38 +01:00
Akinobu Mita
382fa58125 iio: accel: adxl345: add sampling frequency support
The ADXL345 provides selectable output data rate.  This adds the iio
channel information for the sampling frequency with that feature.

Cc: Eva Rachel Retuya <eraretuya@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-15 09:19:06 +01:00
Peter Rosin
3f3a89e1d7 i2c: remove i2c_lock_adapter and use i2c_lock_bus directly
The i2c_lock_adapter name is ambiguous since it is unclear if it
refers to the root adapter or the adapter you name in the argument.
The natural interpretation is the adapter you name in the argument,
but there are historical reasons for that not being the case; it
in fact locks the root adapter. Just remove the function and force
users to spell out the I2C_LOCK_ROOT_ADAPTER name to indicate what
is really going on. Also remove i2c_unlock_adapter, of course.

This patch was generated with

git grep -l 'i2c_\(un\)\?lock_adapter' \
| xargs sed -i 's/i2c_\(un\)\?lock_adapter(\([^)]*\))/'\
'i2c_\1lock_bus(\2, I2C_LOCK_ROOT_ADAPTER)/g'

followed by white-space touch-up.

Signed-off-by: Peter Rosin <peda@axentia.se>
Acked-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-07-13 00:09:37 +02:00
Julia Lawall
794ac821cc iio: adc: max1363: merge calls to of_match_device and of_device_get_match_data
Drop call to of_match_device, which is subsumed by the subsequent
call to of_device_get_match_data.  The code becomes simpler, and a
temporary variable can be dropped.

The semantic match that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
local idexpression match;
identifier i;
expression x, dev, e, e1;
@@
-        match@i = of_match_device(x, dev);
-        if (match) e = of_device_get_match_data(dev);
-        else e = e1;
+        e = of_device_get_match_data(dev);
+        if (!e) e = e1;

@@
identifier r.i;
@@
- const struct of_device_id *i;
... when != i
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-08 10:35:17 +01:00
Stefan Popa
28d1a7ac2a iio: dac: Add AD5758 support
The AD5758 is a single channel DAC with 16-bit precision which uses the
SPI interface that operates at clock rates up to 50MHz.

The output can be configured as voltage or current and is available on a
single terminal.

Datasheet:
http://www.analog.com/media/en/technical-documentation/data-sheets/ad5758.pdf

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 18:16:32 +01:00
Gustavo A. R. Silva
e161ef7c3c iio: mma8452: Mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Warning level 2 was used in this case: -Wimplicit-fallthrough=2

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 18:04:08 +01:00
Gustavo A. R. Silva
82d65f9d55 iio:imu:adis: Mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 18:01:05 +01:00
Colin Ian King
5f0d4fd6b2 iio: dac: ltc2632 remove redundant pointer chip_info and spi_dev_id
Pointers chip_info and spi_dev_id are being assigned but are never used
hence they are redundant and can be removed.

Cleans up clang warning:
warning: variable 'chip_info' set but not used [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 17:46:25 +01:00
Colin Ian King
366995df8b iio: dac: ti-dac5571 remove redundant variable 'shift'
Variable shift is being assigned but is never used hence it is
redundant and can be removed.

Cleans up two clang warnings:
warning: variable ‘shift’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 17:43:37 +01:00
Nikolaus Voss
6b0b3e378e IIO: st_accel_i2c.c: Use probe_new() instead of probe()
struct i2c_device_id argument of probe() is not used, so use probe_new()
instead.

Signed-off-by: Nikolaus Voss <nikolaus.voss@loewensteinmedical.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 17:33:18 +01:00
Nikolaus Voss
19868faad4 IIO: st_accel_i2c.c: Simplify access to driver data
Use device_get_match_data API to simplify access to driver data.
Let acpi_device_id table entries point to the same driver data as
of_device_id table entries and uniquify access to driver data by using
device_get_match_data API. Remove unused i2c_device_id .driver_data
fields.

Signed-off-by: Nikolaus Voss <nikolaus.voss@loewensteinmedical.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 17:32:51 +01:00
Akinobu Mita
7d6cd21d82 iio: adc: ina2xx: avoid kthread_stop() with stale task_struct
When the buffer is enabled for ina2xx driver, a dedicated kthread is
invoked to capture mesurement data.  When the buffer is disabled, the
kthread is stopped.

However if the kthread gets register access errors, it immediately exits
and when the malfunctional buffer is disabled, the stale task_struct
pointer is accessed as there is no kthread to be stopped.

A similar issue in the usbip driver is prevented by kthread_get_run and
kthread_stop_put helpers by increasing usage count of the task_struct.
This change applies the same solution.

Cc: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Fixes: c43a102e67 ("iio: ina2xx: add support for TI INA2xx Power Monitors")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-07-07 17:06:39 +01:00
Greg Kroah-Hartman
7f5d8f7116 Merge 4.18-rc3 into staging-next
We want the staging/iio fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-02 08:21:54 +02:00
Freeman Liu
5df362a6cf iio: adc: Add Spreadtrum SC27XX PMICs ADC support
The Spreadtrum SC27XX PMICs ADC controller contains 32 channels,
which is used to sample voltages with 12 bits conversion.

[Baolin Wang did lots of improvements]

Signed-off-by: Freeman Liu <freeman.liu@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-06-30 18:59:40 +01:00
Akinobu Mita
732238e22e iio: accel: adxl345: add calibration offset support
The ADXL345 provides the offset adjustment registers for each axis.
This adds the iio channel information for the calibraion offsets with
that feature.

Cc: Eva Rachel Retuya <eraretuya@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-06-30 18:27:27 +01:00
Akinobu Mita
9048f1f18a iio: accel: adxl345: convert address field usage in iio_chan_spec
Currently the address field in iio_chan_spec is filled with an accel
data register address for the corresponding axis.

In preparation for adding calibration offset support, this sets the
address field to the index of accel data registers instead of the actual
register address.

This change makes it easier to access both accel registers and
calibration offset registers with fewer lines of code as these are
located in X-axis, Y-axis, Z-axis order.

Cc: Eva Rachel Retuya <eraretuya@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-06-30 18:25:05 +01:00